Guohua Zhang

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Shenzhen, CN

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Patents Grantslast 30 patents

Information Patent Grant
Limited free-motion pump impeller coupling device
- Patent number 7,972,121
- Issue date Jul 5, 2011
- Johnson Electric S.A.
- Guohua Zhang
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Limited free-motion pump impeller coupling device
- Publication number 20080080987
- Publication date Apr 3, 2008
- Johnson Electric S.A.
- Guohua Zhang
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...